Boss List!
Sonic Advance:
Eggmobile H - X Zone
Eggmobile W - X Zone
Egg X - X Zone
Super Egg Robot - Moon Zone
Sonic Advance 2:
XX Zone Boss Rush - XX Zone
Super Egg Robo Z - XX Zone
Egg Shrimp - True Area 53 Zone
Sonic Advance 3:
Gemerl and Hyper Egg Robo - Altar Emerald Zone
Ultimate Gemerl - Nonaggression Zone